A solution of ammonia and water contains #1.40xx10^25# water molecules and #6.30xx10^24# ammonia molecules. How many total hydrogen atoms are in this solution?

1 Answer
Sep 4, 2016

Answer:

#2xx1.40xx10^25+3xx6.30xx10^24# #=#

#"How many hydrogen atoms?"#

Explanation:

We have #1.40xx10^25# water molecules, and #6.30xx10^24# ammonia molecules. Given that for each water molecule there are #2xxH" atoms"#, and for each ammonia molecule there are #3xxH" atoms"#, I make the number #2xx1.40xx10^25+3xx6.30xx10^24# #=# #??#